Even for not so small kids. With my 7 and 9 yo we do one ~30/40min session during the weekend, and a family movie on the 1st weekend of the month. No TV or screen time outside of these.
I can't imagine having a 3yo watching TV 1 hour a day, especially the movies shown on this video.
That being said, to focus on the technical project, that's very cool!
We only do TV on the weekends (Miss Rachel mostly, sometimes a movie), but 1 hour a day seems like nothing considering they're in daycare learning and playing for 8+ hours among the many other things they're doing throughout the day. For me the issue is when it becomes a dependency for them.
I can't imagine having a 3yo watching TV 1 hour a day, especially the movies shown on this video.
That being said, to focus on the technical project, that's very cool!